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<title>EventManager Class Reference</title>
</head>
<body>
<div id="header">
<h1>EventManager Class Reference</h1>
<div id="toc">
  <div id="toctitle">Table of Contents</div>
  <noscript><p><b>JavaScript must be enabled in your browser to display the table of contents.</b></p></noscript>
</div>
</div>
<h2>1. Attributes</h2>
<div class="sectionbody">
<p><em>Italics</em> means private (in the sense that they shouldn't be set manually).</p>
<div class="tableblock">
<table rules="all"
frame="hsides"
cellspacing="0" cellpadding="4">
<col width="251" />
<col width="240" />
<thead>
  <tr>
    <th align="left">
    Attribute
    </th>
    <th align="left">
    Description
    </th>
  </tr>
</thead>
<tbody valign="top">
  <tr>
    <td align="left">
    <strong>keyboard</strong>
    </td>
    <td align="left">
    keyboard event table
    </td>
  </tr>
  <tr>
    <td align="left">
    keyboard.pressed
    </td>
    <td align="left">
    keyboard pressed events
    </td>
  </tr>
  <tr>
    <td align="left">
    keyboard.released
    </td>
    <td align="left">
    keyboard release events
    </td>
  </tr>
  <tr>
    <td align="left">
    <strong>mouse</strong>
    </td>
    <td align="left">
    mouse event table
    </td>
  </tr>
  <tr>
    <td align="left">
    mouse.motion
    </td>
    <td align="left">
    mouse motion event
    </td>
  </tr>
  <tr>
    <td align="left">
    mouse.pressed
    </td>
    <td align="left">
    mouse pressed events
    </td>
  </tr>
  <tr>
    <td align="left">
    mouse.released
    </td>
    <td align="left">
    mouse released events
    </td>
  </tr>
  <tr>
    <td align="left">
    <strong>joystick</strong>
    </td>
    <td align="left">
    joystick event table
    </td>
  </tr>
  <tr>
    <td align="left">
    joystick.axis_motion
    </td>
    <td align="left">
    joystick axis motion events
    </td>
  </tr>
  <tr>
    <td align="left">
    joystick.ball_motion
    </td>
    <td align="left">
    joystick ball motion events
    </td>
  </tr>
  <tr>
    <td align="left">
    joystick.hat_motion
    </td>
    <td align="left">
    joystick hat motion events
    </td>
  </tr>
  <tr>
    <td align="left">
    joystick.pressed
    </td>
    <td align="left">
    joystick button pressed events
    </td>
  </tr>
  <tr>
    <td align="left">
    joystick.released
    </td>
    <td align="left">
    joystick button released events
    </td>
  </tr>
  <tr>
    <td align="left">
    quit
    </td>
    <td align="left">
    quit event
    </td>
  </tr>
  <tr>
    <td align="left">
    <em>type</em>
    </td>
    <td align="left">
    state variable
    </td>
  </tr>
  <tr>
    <td align="left">
    <em>state</em>
    </td>
    <td align="left">
    state variable
    </td>
  </tr>
  <tr>
    <td align="left">
    <em>arg1</em>
    </td>
    <td align="left">
    state variable
    </td>
  </tr>
  <tr>
    <td align="left">
    <em>arg2</em>
    </td>
    <td align="left">
    state variable
    </td>
  </tr>
  <tr>
    <td align="left">
    <em>arg3</em>
    </td>
    <td align="left">
    state variable
    </td>
  </tr>
  <tr>
    <td align="left">
    <em>arg4</em>
    </td>
    <td align="left">
    state variable
    </td>
  </tr>
</tbody>
</table>
</div>
</div>
<h2>2. Methods</h2>
<div class="sectionbody">
<div class="tableblock">
<table rules="all"
frame="hsides"
cellspacing="0" cellpadding="4">
<col width="171" />
<col width="285" />
<thead>
  <tr>
    <th align="left">
    Method
    </th>
    <th align="left">
    Description
    </th>
  </tr>
</thead>
<tbody valign="top">
  <tr>
    <td align="left">
    new(o)
    </td>
    <td align="left">
    constructor
    </td>
  </tr>
  <tr>
    <td align="left">
    gather_events()
    </td>
    <td align="left">
    processes all pending events
    </td>
  </tr>
</tbody>
</table>
</div>
</div>
<h2>3. Event Function Prototypes</h2>
<div class="sectionbody">
<div class="tableblock">
<table rules="all"
frame="hsides"
cellspacing="0" cellpadding="4">
<col width="251" />
<col width="228" />
<thead>
  <tr>
    <th align="left">
    Event
    </th>
    <th align="left">
    Prototype
    </th>
  </tr>
</thead>
<tbody valign="top">
  <tr>
    <td align="left">
    mouse.motion
    </td>
    <td align="left">
    function(x, y, xrel, yrel)
    </td>
  </tr>
  <tr>
    <td align="left">
    mouse.pressed
    </td>
    <td align="left">
    function(x, y)
    </td>
  </tr>
  <tr>
    <td align="left">
    mouse.released
    </td>
    <td align="left">
    function(x, y)
    </td>
  </tr>
  <tr>
    <td align="left">
    joystick.axis_motion
    </td>
    <td align="left">
    function(axis, axis_value)
    </td>
  </tr>
  <tr>
    <td align="left">
    joystick.ball_motion
    </td>
    <td align="left">
    function(ball, xrel, yrel)
    </td>
  </tr>
  <tr>
    <td align="left">
    joystick.hat_motion
    </td>
    <td align="left">
    function(hat, hat_value)
    </td>
  </tr>
  <tr>
    <td align="left">
    joystick.pressed
    </td>
    <td align="left">
    function(button)
    </td>
  </tr>
  <tr>
    <td align="left">
    joystick.released
    </td>
    <td align="left">
    function(button)
    </td>
  </tr>
  <tr>
    <td align="left">
    quit
    </td>
    <td align="left">
    function()
    </td>
  </tr>
</tbody>
</table>
</div>
</div>
<h2>4. Notes</h2>
<div class="sectionbody">
<p>Joysticks and joystick buttons start numbering at 1, not 0.</p>
</div>
<h2>5. Usage</h2>
<div class="sectionbody">
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 2.4
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
<pre><tt><span style="font-style: italic"><span style="color: #9A1900">--create a new EventManager</span></span>
evman <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">EventManager:new</span></span><span style="color: #990000">()</span>

<span style="font-style: italic"><span style="color: #9A1900">--add an event to exit when ESC is pressed</span></span>
<span style="font-style: italic"><span style="color: #9A1900">-- assumes main loop is controlled by variable "done"</span></span>
evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>pressed<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>ESCAPE<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> done <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">true</span></span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>

<span style="font-style: italic"><span style="color: #9A1900">--events to control a player object's movement</span></span>
evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>pressed<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>UP<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> player<span style="color: #990000">.</span>y_vel <span style="color: #990000">=</span> <span style="color: #990000">-</span><span style="color: #993399">1</span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>pressed<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>DOWN<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> player<span style="color: #990000">.</span>y_vel <span style="color: #990000">=</span> <span style="color: #993399">1</span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>pressed<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>LEFT<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> player<span style="color: #990000">.</span>x_vel <span style="color: #990000">=</span> <span style="color: #990000">-</span><span style="color: #993399">1</span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>pressed<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>RIGHT<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> player<span style="color: #990000">.</span>x_vel <span style="color: #990000">=</span> <span style="color: #993399">1</span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>

evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>released<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>UP<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> player<span style="color: #990000">.</span>y_vel <span style="color: #990000">=</span> <span style="color: #993399">0</span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>released<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>DOWN<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> player<span style="color: #990000">.</span>y_vel <span style="color: #990000">=</span> <span style="color: #993399">0</span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>released<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>LEFT<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> player<span style="color: #990000">.</span>x_vel <span style="color: #990000">=</span> <span style="color: #993399">0</span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>released<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>RIGHT<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> player<span style="color: #990000">.</span>x_vel <span style="color: #990000">=</span> <span style="color: #993399">0</span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>

<span style="font-style: italic"><span style="color: #9A1900">--EventManager for a fictional menu object</span></span>
menu_evman <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">EventManager:new</span></span><span style="color: #990000">()</span>
menu_evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>pressed<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>UP<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> menu<span style="color: #990000">.</span><span style="font-weight: bold"><span style="color: #000000">next_item</span></span><span style="color: #990000">()</span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
menu_evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>pressed<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>DOWN<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> menu<span style="color: #990000">.</span><span style="font-weight: bold"><span style="color: #000000">prev_item</span></span><span style="color: #990000">()</span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
menu_evman<span style="color: #990000">.</span>keyboard<span style="color: #990000">.</span>pressed<span style="color: #990000">[</span>Keys<span style="color: #990000">.</span>RETURN<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> menu<span style="color: #990000">.</span><span style="font-weight: bold"><span style="color: #000000">execute</span></span><span style="color: #990000">()</span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>

<span style="font-style: italic"><span style="color: #9A1900">--Controlling a player with the mouse</span></span>
<span style="font-style: italic"><span style="color: #9A1900">-- assume there exists a player:set_pos(x,y) method</span></span>

<span style="font-style: italic"><span style="color: #9A1900">--wrapper function for player:set_pos(x,y)</span></span>
<span style="font-weight: bold"><span style="color: #0000FF">function</span></span> <span style="font-weight: bold"><span style="color: #000000">move_player</span></span><span style="color: #990000">(</span>x<span style="color: #990000">,</span>y<span style="color: #990000">)</span>
  <span style="font-weight: bold"><span style="color: #000000">player:set_pos</span></span><span style="color: #990000">(</span>x<span style="color: #990000">,</span>y<span style="color: #990000">)</span>
<span style="font-weight: bold"><span style="color: #0000FF">end</span></span>

evman<span style="color: #990000">.</span>mouse<span style="color: #990000">.</span>motion <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #000000">move_player</span></span><span style="color: #990000">(</span>x<span style="color: #990000">,</span>y<span style="color: #990000">)</span>
evman<span style="color: #990000">.</span>mouse<span style="color: #990000">.</span>pressed<span style="color: #990000">[</span>MouseButton<span style="color: #990000">.</span>BUTTON_LEFT<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> player<span style="color: #990000">.</span>firing <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">true</span></span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>
evman<span style="color: #990000">.</span>mouse<span style="color: #990000">.</span>released<span style="color: #990000">[</span>MouseButton<span style="color: #990000">.</span>BUTTON_LEFT<span style="color: #990000">]</span> <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> player<span style="color: #990000">.</span>firing <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">false</span></span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>

<span style="font-style: italic"><span style="color: #9A1900">--quitting (assumes main loop is controlled by done variable)</span></span>
evman<span style="color: #990000">.</span>quit <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">function</span></span><span style="color: #990000">()</span> done <span style="color: #990000">=</span> <span style="font-weight: bold"><span style="color: #0000FF">true</span></span> <span style="font-weight: bold"><span style="color: #0000FF">end</span></span>

</tt></pre></div></div>
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Last updated 09-Jan-2008 19:32:57 EDT
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